Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017
OPERATING ACTIVITIES:
Net loss	$ (20,779)	$ (158,176)
Adjustments to reconcile net loss to cash provided by operating activities:
Depletion, depreciation and amortization	47,029	54,348
Amortization of debt issuance costs	786	640
Gain on debt extinguishment		(5,053)
Commodity derivative loss (gain)	10,068	(1,115)
Settlements of commodity derivatives	(6,685)	(1,481)
Exploration expense		3,154
Share-based compensation expense	2,124	3,518
Deferred income tax (benefit) provision	(4,753)	129,933
Other non-cash items	30	(32)
Changes in operating assets and liabilities:
Accounts receivable	(966)	980
Prepaid expenses and other current assets	(1,573)	(240)
Accounts payable	(1,418)	(1,076)
Oil, NGLs and gas sales payable	739	522
Accrued liabilities	4,748	3,620
Cash provided by operating activities	29,350	29,542
INVESTING ACTIVITIES:
Additions to oil and gas properties	(46,493)	(45,712)
Additions to furniture, fixtures and equipment, net	(31)	(14)
Change in working capital related to investing activities	14,513	(968)
Cash used in investing activities	(32,011)	(46,694)
FINANCING ACTIVITIES:
Borrowings under credit facility	90,100	76,750
Repayment of amounts outstanding under credit facility	(85,600)	(57,750)
Equity issuance costs		(2,767)
Tax withholdings related to restricted stock	(632)	(118)
Debt issuance costs	(14)
Change in working capital related to financing activities	(1,192)	1,037
Cash provided by financing activities	2,662	17,152
CHANGE IN CASH AND CASH EQUIVALENTS	1
CASH AND CASH EQUIVALENTS, beginning of period	21	21
CASH AND CASH EQUIVALENTS, end of period	22	21
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	16,267	14,024
SUPPLEMENTAL DISCLOSURE OF NON-CASH TRANSACTION:
Asset retirement obligations capitalized	$ 19	$ 31

Non-cash exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells.

No definition available.